📄 helloworld.java
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import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HelloWorld extends HttpServlet
{
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
{
res.setContentType("text/html;charset=GBK");
PrintWriter out = res.getWriter();
out.println("<html><head></head><body>");
out.println("<h1>Hello World</h1>");
out.println("</body></html>");
out.close();
}
}
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